Narrow stripe-width, low-ridge high power quantum cascade lasers

Narrow stripe-width, low-ridge quantum cascade lasers operating at 5.3μm were fabricated from InP-based, metal-organic chemical-vapor-deposition-grown material. Maximum peak-pulsed output power of 12W at 14A was measured from a low-ridge laser with a high reflectivity coated back facet. Modeling shows that the lateral variation of the transverse conductivity is essential for an accurate description of the current spreading in these devices.